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Audio Research HD-220 Hybrid Power amplifier

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SKU: AudioResearchHD220
Audio Research HD-220 Power amplifier

Power output 220 watts per channel into 8 ohms from 20Hz to 20kHz. 380 watts per channel into 4 ohms.
Power bandwidth
Frequency response (-3dB points at 1 watt) 0.5Hz to 200 kHz
Input sensitivity 4.0V RMS BAL for rated output. (20.8 dB Bal gain into 8 ohms.)
Input impedance 300K ohms Balanced, 150k ohms SE
Output taps
Output regulation Approximately 0.07dB 8 ohm load to open circuit
Overall negative feedback None
Damping factor Approximately 130
Slew rate
Rise time
Hum & noise Less than 0.1mV RMS -112dB below rated output (IHF weighted, input shorted).
Power supply energy storage 200,000 µF
Power requirements 105-125VAC 60Hz (210-250VAC 50 Hz) 750 watts at rated output (220 WPC 8 ohms) 1200 watts max (380 WPC 4 ohms) 250 watts at "idle."
Tube complement (2) 6H30 driver, (2) 6922 voltage amp.
Other Output polarity: Non-inverting. Balanced input pin 2+ (IEC-268).
Dimensions 19" (48.3 cm) W x 8.75"(22.2 cm) H x 19.5"(49.5 cm) D. Handles extend 1.5" (3.8 cm) forward.
Weight 58.9 lbs. (26.8 kg) Net; 73.8 lbs. (33.6 kg) Shipping

Availability: In stock

Product Description


    Audio Research HD-220 Power amplifier 220 watts per channel stereo - SILVER arriving shortly pictures coming soon
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